' Andrew Stewart, 1st Lord of Avandale was born illegitimately before 1425.2 He was the son of Walter Stewart, Master of Fife and unknown daughter Campbell.1,3 He died in July 1488, without issue.1,3

' He was invested as a Knight circa 1437.3 He was created 1st Lord of Avandale [Scotland] in 1439.1,2 He held the office of Lord Warden of the Marches between 1456 and 1460.3 He held the office of Lord High Chancellor [Scotland] between 1460 and 1462.3 He held the office of Keeper of Stirling Castle in 1467.3 He held the office of Ambassador to Denmark in 1468.3 In 1471 he was granted a life-rent on the lands of the Earldom of Lennox.3 He built the Castle of Strathaven.3 On 17 April 1479 he was legitimised.2 He held the office of Ambassador to France in 1484, jointly.3

'Andrew Stewart (x1426–1488) was Lord Chancellor of Scotland from 1460 to 1482 and one of the leading servants of King James III of Scotland.

'Andrew Stewart was born c.1426[1][2] in Antrim, Ireland, and was the youngest illegitimate son of James the Fat, who in turn was the sole surviving son of Murdoch Stewart, Duke of Albany, executed for treason in 1425 by King James I of Scotland.[2][3][4]

When his grandfather the Duke of Albany was executed by the vengeful King James I in 1425, his father James Mor Stewart fled Scotland and took refuge in Ireland. 'Andrew Stewart was the youngest of approximately seven children.

After his father's death in 1429[5] 'Andrew Stewart was raised at the court of his paternal grandmother Isabella, Countess of Lennox.[6] It may be that Isabella, having seen her own children and husband executed by James I of Scotland, took pity on her dead son's children and brought them to her own court. .....

'He died in 1488[7] and was succeeded by his brother Walter's son Alexander. Alexander died circa 1500 and the title Lord Avandale passed to another nephew, Andrew Stewart, 2nd Lord Avandale.